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Microscope.ppt.. gsorbifosjfosveofiaiwvfof
- 1.
- 2. • Always carrywith 2 hands • Only use lens paper for cleaning • Do not force knobs • Always store covered • Keep objects clear of desk and cords
- 3. Parts of aCompound Microscope compound microscope
- 4. Eyepiece Body Tube Revolving Nosepiece Arm ObjectiveLens Stage Stage Clips Coarse Focus Fine Focus Base Diaphragm Light
- 5. Compound Microscope • Amicroscope is a very powerful magnifying glass • A microscope helps you see things like cells up close
- 6. Eyepiece • View thespecimen through the eyepiece
- 7. Stage Clips &Objectives • Stage clips hold the slide in place • Low power objective is used to focus the microscope (short & fat) • High power objective is used to view details of a specimen
- 8. Coarse Adjustment, Fine Adjustment,& Base • Coarse adjustment focuses adjustment • Fine adjustment fine tunes & gives detailed focus(usually smaller than coarse adjustment knob) • Base is where the microscope rests
- 9. Stage • Stage ispart where the slide rests • Mirror (or light source) directs light upwards onto the slide.
- 10.
- 11. Nosepiece • Nosepiece isthe rotating device that holds the objectives (lenses)
- 12. Arm • Arm isthe part where you carry the microscope
- 13. Can you namethe parts of a compound microscope?
- 14. Answers 1) base 2) mirror(light source) 3) diaphragm 4) stage 5) stage clips 6) low power objective lens 7) high power objective lens 8) nosepiece 9) arm 10) fine focus knob 11) body tube 12) coarse focus knob 13) eyepiece
- 15.
- 16. Light microscope • (forsmall objects - similar to the way binoculars magnify objects far away.)
- 17.
- 18. •May have manylenses that magnify the object •Eyepiece = 10x magnification •Objective = 10x (low) or 40X (high)
- 19. •Total magnification= •eyepiece Xobjective •ex: 10x X 40x = 400x total magnification
- 20. Compound Light Microscope •Powered by Light & Lenses a)Powers of Magnification • Ocular Lens= _________ • Low Power Objective= _______ • Medium Power Objective= _______ • High Power Objective= _______ • Calculating Total Magnification= ____________ b)Resolution c) Parts
- 21. Stereomicroscope • To lookat large things that light cannot pass through (one eyepiece for each eye)
- 22.
- 23. Stereomicroscopes •3 - Dimage •can only magnify 10x to 600x
- 24. Electron Microscope • canmagnify more than 500,000x
- 26.
- 27. • Place theSlide on the Microscope • Use Stage Clips • Click Nosepiece to the lowest (shortest) setting • Look into the Eyepiece • Use the Coarse Focus
- 28. • Follow stepsto focus using low power • Click the nosepiece to the longest objective • Do NOT use the Coarse Focusing Knob • Use the Fine Focus Knob to bring the slide into focus What can you find on your slide?
Editor's Notes
- #1 Students will have their microscopes out, for reference as we go through each of the steps. As an introduction, students will be asked what kinds of things they can do with this tool.
- #2 Teacher demonstrates how to hold the microscope, where the lens paper is located and how to use it. Students will be invited to turn the knobs and observe the stage as it moves up and down. Teacher will demonstrate how to store the microscope.
- #4 This is the exact version of the microscope used in class. Students will be identifying the parts on the microscopes at their desks as we go along and what their functions are.
- #27 Give students a slide from the “common things” set, each student will practice focusing and changing objectives.
- #28 Have students exchange slides so they can look at different things, walk them through using the high power objective to focus slides. Emphasize not using the coarse objective during this process, as it will crack the slides.